Struggles a fair bit with balance. Been playing for a couple hours or so, and it's still bordering on insultingly easy. You basically have to slightly care about your choices for the first 1-2 waves. Then after that it's a completely free win, basically no matter what you do.
Main issue being that the income buildings scale way too well. So you just end up with 400-500 income/second very fast. With how the towers are priced. That means you just hit the point where you insta-spawn kill for the entire duration of the map. Either by spamming Crossbows or Garbage on the spawns.
Since there is no speed up, and you know you've won like 1 minute into the map. That leads to a lot of "dead time" where you really are just waiting to win.